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A comparative study of the application of lesson study in different university learning environments
Centeno Hernáez, Efraim; Aláez Martínez, María Ángeles; Fonseca Escudero, David; Fernández Bernal, Fidel; Wogrin, Sonja; Romero Yesa, Susana; Ferrán Zubillaga, Ane; Alsina Claret, María; Necchi, SilviaThis paper presents the application of Lesson Study technique to seven subjects in different faculties in three Spanish universities. Lesson study is a methodology for the improvement of any teaching activity based on the ... -
Addressing flexibility issues in clustered unit commitment formulations for generation expansion planning models
Tejada Arango, Diego Alejandro; Morales España, German Andres; Wogrin, Sonja; Centeno Hernáez, EfraimThis work proposes a Clustered Unit Commitment (CUC) formulation to accurately model flexibility requirements such as ramping, reserve, and startupshutdown constraints. The classic CUC intrinsically and hiddenly overestimates ... -
Analysis of storage and water value in power systems for policymaking on renewable energies
Tejada Arango, Diego Alejandro; Siddiqui, Afzal Saeed; Wogrin, Sonja; Centeno Hernáez, EfraimAs variable Renewable Energy Source (vRES) production, e.g., solar and wind, increases, additional Energy Storage (ES) capacity may be desirable in order to manage vRES intermittency. Moreover, since Battery Energy Storage ... -
Analyzing time period aggregation methods for power system investment and operation models with renewables and storage
Wogrin, Sonja; Tejada Arango, Diego Alejandro; Pineda Morente, Salvador; Morales González, Juan MiguelThe transition of the power system from its current state to the power system of the future is heavily influenced by the growing penetration of renewables combined with the increasing importance of storage technologies. ... -
Annualized versus overall investment cost in generation capacity expansion planning
Centeno Hernáez, Efraim; Wogrin, SonjaInvestment costs are significantly decreasing along the years for some electricity generation technologies (such as wind or solar), making them an attractive option for generation capacity expansion. Nevertheless, most of ... -
Considering decentralized storage and renewable investments in transmission expansion planning: a bi-level approach
González Romero, Isaac Camilo; Wogrin, Sonja; Gómez San Román, TomásIn modern deregulated electricity markets, centralized TSOs decide network expansion, by aiming to maximize social welfare, while decentralized generation companies decide their generation investment by maximizing their ... -
Considering strategic market feedback in transmission expansion planning: a bi-level approach
González Romero, Isaac Camilo; Wogrin, Sonja; Gómez San Román, TomásThe growing penetration of renewable technologies, as well as the increasing needs of storage technologies, has introduced new challenges into the design of electricity markets. Therefore, centralized TSOs decide network ... -
Enhanced representative days and system states modeling for energy storage investment
Tejada Arango, Diego Alejandro; Wogrin, Sonja; Centeno Hernáez, Efraim -
How technical operational details affect generation expansion in oligopolistic power markets
Wogrin, Sonja; Centeno Hernáez, Efraim; Nogales Gómez, Adelaida -
Impact of fatigue cycling costs on CCGT operations
Wogrin, Sonja; Galbally, David; Ramos Galán, AndrésCombined cycle gas turbine power plants (CCGTs) play a key role in modern electric power systems due to their operational flexibility and the firmness they provide to the networks where they operate. Due in part to this ... -
Minimum-cost-based capacity planning: does annualized capital expenditure always yield full cost recovery with marginal pricing? (extended version)
Centeno Hernáez, Efraim; Campos Fernández, Francisco Alberto; Maguregui, Javier; Fernández Palomino, Luis Jesús; Wogrin, SonjaThis paper compares three ways of dealing with the annualization of investment cost (CapEx) when analyzing minimum-cost capacity expansion planning. The first is the classic single-year annualized cost representation, while ... -
Minimum-cost-based electricity generation capacity planning: does annualized investment cost always yield full cost recovery with marginal pricing?
Centeno Hernáez, Efraim; Campos Fernández, Francisco Alberto; Maguregui, Javier; Wogrin, SonjaThis papers presents some advances in answering the question of cost recovery of investments for the optimal technological mix in electricity systems. -
On the proper use of net present value for capacity expansion planning with renewable generation
Centeno Hernáez, Efraim; Wogrin, Sonja; Tejada Arango, Diego AlejandroGeneration investment costs are significantly decreasing for some renewable technologies as wind or solar power, making them an attractive option for generation capacity expansion. Nevertheless, most of the available ... -
Open versus closed loop capacity equilibria in electricity markets under perfect and oligopolistic competition - The case of asymmetric electricity generation firms
Wogrin, Sonja; Hobbs, Benjamin F.; Ralph, Daniel; Centeno Gonzalez, Jóse; Barquín Gil, JuliánIn this paper we consider cost asymmetry of generation companies when comparing open and closed loop equilibrium models of the generation capacity expansion problem in liberalized electricity markets. We show that under ... -
Optimizing storage allocation and investment for transmission constrained networks considering losses and high renewable penetration
Wogrin, Sonja; Tejada Arango, Diego Alejandro; Yacar, DeanThis work investigates the effects of transmission losses, constraints and increased renewable energy penetration on planning energy storage allocation and investment. By modifying a DC Optimal Power Flow model using a ... -
Optimizing storage operations in transmission-constrained networks for medium-and long-term operation
Tejada Arango, Diego Alejandro; Wogrin, Sonja; Centeno Hernáez, EfraimThe main objective is to present a new approach to model the storage operation in the context of Medium-and Long-term Operational Planning (MLTOP). This approach is based on the system-state framework but including ... -
Proactive bi-level geptep with storage considerations
González Romero, Isaac Camilo; Wogrin, Sonja; Gómez San Román, TomásUnder the current European market environment, transmission companies (TRANSCOs) have to decide network expansion by maximizing social welfare while the generation companies (GENCOs) decide their expansion with the aim of ... -
Show me the money! Energy storage systems between the technically feasible and the economically viable
Wogrin, Sonja; Tejada Arango, Diego AlejandroDue to the recommendations of the IPCC Global Warming report [ 1 ], CO2 emissions have to be halved by 2030 in order to avoid devastating changes to our climate. The 2030 climate and energy framework [ 2 ] that was adopted ... -
Show me the money! Profitability of energy storage systems in low-carbon power systems
Wogrin, Sonja; Tejada Arango, Diego Alejandro; Delikaraoglou, Stefanos; Botterud, AudunEnergy storage systems are bound to play a critical role in the transition towards a decarbonized power sector with high shares of variable renewables. However, an open question is whether all storage capacity that is ... -
The role of energy storage systems in expansion planning for low-inertia grids
Wogrin, SonjaOn our path to a cleaner and ultimately carbon-free power system, energy storage technologies are bound to play an indispensable role. In this work, we assess the importance of storage in both market-based services (e.g. ...